English: Gama Supreme Flat Top ebonite fountain pen. This is an example of a large or jumbo sized ebonite eye dropper fountain pen that was handmade in 2014 by Gem & Co pen specialists in Chennai, India. On the pen the tool marks from turning the pen out of green/black rippled and black ebonite rods are visible. The ebonite postable cap features a metal clip and cap band to prevent cracking the cap rim. The section and feed of the pen are also made out of ebonite.

Dimensions:
Length capped: 165 mm
Length uncapped: 147 mm
Length posted: 192 mm
Cap length: 75.5 mm
Cap diameter: 19 mm
Cap breather hole(s): 1 hole for pressure equalization during uncapping
Barrel length: 104 mm
Barrel diameter: 17.3 mm
Section length: 22 mm
Section diameter: 15.5 mm tapers to 13.4 mm
Feed diameter: 6.35 mm (¼ inch)
Nib exposed length with the OEM Indian № 10 Iridium Point Germany: 22 mm (size wise a German #6 nib equivalent)
Ink capacity: 3.5 ml (usable volume for storing ink in the barrel)
Barrel weight: 29 g (filled with ink)
Cap weight: 13 g
Total weight: 42 g (filled with ink)

Turns to uncap: 5½ turns